import java.io.*;
public class Read implements Runnable {
	   DataInputStream in;
	      public void setDataInputStream(DataInputStream in) {
		            this.in = in;
			       }
	         public void run() {
			       double result=0;
			             while(true) {
					             try{ result=in.readDouble();
							                  System.out.println("圆的面积:"+result);
									               System.out.print("输入园的半径(放弃请输入N):");
										               }
						             catch(IOException e) { 
								                  System.out.println("与服务器已断开"+e);
										               break;
											               }   
							           }
				        }
}
